Unipolar permenant-magnet excitation bi-stable electromagnetic system of relay

Abstract

The invention relates to a unipolar permenant-magnet excitation bi-stable electromagnetic system of a relay, which consists of yoke irons, exciting coils, magnet cores, a permanent magnet steel and an armature iron; two exciting coils adopt a horizontal coaxial structure; the permanent magnet steel adopts a knife edge type unipolar structure; the two coils adopt a separate magnet core and yoke iron segmental structure; the two exciting coils are provided with separate magnet cores and yoke irons respectively, and separately work to form separate magnetic loops; the armature iron has a symmetrical structure, the middle of the armature iron is supported on the knife edge of the magnet steel, and two ends of the armature iron are in working contact with two yoke irons respectively; and the magnet steel, the two coils, and the two yoke irons are connected on the same horizontal shaft through two magnet cores. The unipolar permenant-magnet excitation bi-stable electromagnetic system overcomes the inherent defects of differential type, balance type and bridge type electromagnetic systems.

Description

1. Technical field [0001] The invention belongs to the field of relays. In particular, it belongs to a relay unipolar permanent magnet excitation bistable electromagnetic system. 2. Background technology [0002] The structure of an electromagnetic relay generally includes an electromagnetic system, a contact system, a connecting bracket, and a combination of housings. [0003] The electromagnetic system is a mechanism that converts the external excitation electric energy into mechanical energy through the magnetic circuit system, generally including excitation coils, magnetic circuit parts, moving armatures and other components; the contact system is a mechanism that uses the mechanical energy provided by the electromagnetic system to achieve load switching, generally with support The base, contact reed group and other components; the connecting bracket is a part that connects the electromagnetic system and the contact system as a whole, and its structural strength directl...

AI Technical Summary

Problems solved by technology

[0004] The electromagnetic system is the core part of the entire relay. The efficiency and stability of the electromagnetic system is the key to improving the performance of the relay. With the increasing environmental requirements of the relay, the conventional electromagnetic electromagnetic system can no longer meet its use requirements. Therefore, The permanent magnetic steel enters the structure of the relay and gradually replaces the conventional return spring as a key part of the relay

[0005] Electromagnetic systems that generally use permanent magnet steel as the excitation source include balanced force electromagnetic systems, bridge electromagnetic systems, and differential electromagnetic systems. With the increasing requirements for the use of relays, these electromagnetic systems can no longer meet the design requirements need

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